Vote for your favorite mineral in #MinCup26! - Quartz vs. Asagiite
It's a classic vs a newbie as the most common named mineral in the crust Quartz is up against an exceedingly-rare sea foam-green mineral discovered just a few years ago Asagiite.
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Biotite from
Dazengxigou, Ningshan pegmatite district, Ningshan County, Ankang, Shaanxi, China


Locality type:Pegmatite
Classification
Species:'Biotite' (not an IMA approved species)
Formula:K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Biotite data
Locality Data:Click here to view Dazengxigou, Ningshan pegmatite district, Ningshan County, Ankang, Shaanxi, China
Data Identifiers
Mindat Occurrence Record ID:1384955
Long-form Identifier:1:3:1384955:1
GUID (UUID V4):0
Nearest other occurrences of Biotite
3.9km (2.4 miles) ⓘLizhaping, Ningshan pegmatite district, Ningshan County, Ankang, Shaanxi, China
4.4km (2.7 miles) ⓘXinjian, Ningshan pegmatite district, Ningshan County, Ankang, Shaanxi, China
22.6km (14.0 miles) ⓘGuilingou Mo-W deposit, Zhen'an County, Shangluo, Shaanxi, China
38.5km (23.9 miles) ⓘYindongzi Pb-Ag deposit, Ningshan County, Ankang, Shaanxi, China
45.1km (28.0 miles) ⓘQiuling Au-Hg-Sb deposit, Jinlongshan Au ore field, Zhen'an County, Shangluo, Shaanxi, China
58.8km (36.5 miles) ⓘNaore village, Ziyang County, Ankang, Shaanxi, China
74.7km (46.4 miles) ⓘMa'anqiao Au deposit, Zhouzhi County, Xi'an, Shaanxi, China
77.6km (48.2 miles) ⓘDaxigou Fe-Cu-Ba deposit, Zhashui County, Shangluo, Shaanxi, China
81.3km (50.5 miles) ⓘLengshuigou Cu-Mo deposit, Zhashui County, Shangluo, Shaanxi, China
83.1km (51.6 miles) ⓘHaoping Nb–REE-mineralized trachyte, Ziyang County, Ankang, Shaanxi, China
References
Nie, X.
Wang, Z.
Chen, L.
Wang, G.
Nie, Xiao, Wang, Zongqi, Chen, Lei, Wang, Gang, Li, Zengda (2020) Geochemical Contrasts between Late Triassic Rb-Rich and Barren Pegmatites from Ningshan Pegmatite District, South Qinling Orogen, China: Implications for Petrogenesis and Rare Metal Exploration. Minerals, 10 (7) 582 doi:10.3390/min10070582
 
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